SHORE OF LAKE HURON 4^ 



Lepidium virginicum L. Wild peppergrass. In cities, villages and 



cultivated grounds as a weed. Seldom abundant. 



Lepidium apetalum Willd. Apetalous peppergrass. A weed in cities 

 and villages throughout but apparently infrequent. 



Capsella bursa-pastoris (L.) Medic. Shepherd's purse. Cultiva* 

 grounds and waste places. Common. 



Camelina sativa (L.) Crantz. False flax. About cities and village 

 and along railroads as a weed. Infrequent. 



Cakile edeniula (Bigel.) Hook. American sea rocket. On and near 

 sandy beach of Lake Huron throughout. Seldom abundant. 



Brassica arvensis (L.) Ktze. Common mustard. About cities and 

 villages and in cultivated grounds as a weed, but not noticed as abundant 

 anywhere. 



Brassica nigra (L.) Koch. Black mustard. Noticed as a weed about 

 cities and villages. Infrequent. 



Brassica campestris L. Rutabaga. Occasional as a temporary escape 

 about cities and villages and along railways. 



Conringla orientalis (L.) Dumont. Hare's-ear mustard. Apparently 

 well established about cottages and in cultivated grounds on Bois Blanc 

 Island, Mackinac County. 



Sisymbrium officinale leiocarpum DC. Smooth podded hedge mustard. 

 About cities and villages and in cultivated grounds. Infrequent. 



Sisymbrium altissimum L. Tumble mustard. About depot grounds 

 in cities and villages, and in waste places. Frequent. 



Braya humilis (C. A. Mey.) Robinson. Low rock cress. On Mackinac 

 Island. G. H. Hicks. Not noticed in 1912. 



Erysimum cheiranthoides L. Worm-seed mustard. About cities and 

 villages and in waste places as a weed throughout, but infrequent. 



Radicula nasturtium-aquaticum (L.) Britten & Rendel. True water 

 cress. In ditches, small creeks and about springs throughout. Often 

 plentiful. 



Radicula palustris (L.) Moench. Marsh cress. In wet open ground 

 from Bay County to St. Ignace, Mackinac County. Plentiful, often 

 abundant. 



Radicula palustris hispida (Desv.) Robinson. Hispid yellow en ss. 

 Wet open ground throughout. Infrequent. 



Radicula armoracia (L.) Robinson. Horseradish. Frequent in dam}) 

 places about cities and villages. Noticed in particular as a well estab- 

 lished escape in an old field at Misery Bay near Alpena, Alpena County. 



Barbarea vulgaris R.Br. Common winter cress. Low open ground. 

 Frequent throughout. Abundant in spots in Cheboygan County and on 

 Mackinac Island, Mackinac County. 



Dentaria diphylla Michx. Two-leaved toothwort. In rich shaded 



